I guess the iPhone is not the only one with 3G issues:
http://news.cnet.com/8301-1035_3-10064592-94.html?part=rss&subj=news&tag=2547-1_3-0-5
http://news.cnet.com/8301-1035_3-10064592-94.html?part=rss&subj=news&tag=2547-1_3-0-5